Chemical and physical properties of alginate-like exopolymers of aerobic granules and flocs produced from different wastewaters.

Autor: Schambeck CM; Sanitary and Environmental Engineering Department, Federal University of Santa Catarina, 88040-970 Florianópolis, Brazil; Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland., Girbal-Neuhauser E; Laboratoire de Biotechnologies Agroalimentaire et Environmentale (LBAE), Université Paul Sabatier, 31000 Toulouse, France., Böni L; Institute of Food, Nutrition and Health, Department of Health Science and Technology, ETH Zürich, 8092 Zürich, Switzerland., Fischer P; Institute of Food, Nutrition and Health, Department of Health Science and Technology, ETH Zürich, 8092 Zürich, Switzerland., Bessière Y; TBI, Université de Toulouse, CNRS, INRA, INSA, Toulouse, France., Paul E; TBI, Université de Toulouse, CNRS, INRA, INSA, Toulouse, France., da Costa RHR; Sanitary and Environmental Engineering Department, Federal University of Santa Catarina, 88040-970 Florianópolis, Brazil., Derlon N; Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland. Electronic address: nicolas.derlon@eawag.ch.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2020 Sep; Vol. 312, pp. 123632. Date of Electronic Publication: 2020 Jun 05.
DOI: 10.1016/j.biortech.2020.123632
Abstrakt: The influence of wastewater (WW) composition and the bioaggregates types (floccular vs. aerobic granular sludge - AGS) on the content, physical-chemical, hydrogel and rheological properties of Alginate-Like Exopolymers (ALE) was studied. Results showed that ALE are a complex mixture of proteins, humic acids and polysaccharides. Overall, rather similar ALE content and composition was observed for the different types of sludge. Only the AGS fed with acetate and propionate yielded significantly larger amount of ALE (261 ± 33 mg VS ALE /g VS sludge , +49%) and of uronic sugars in ALE (254 ± 32 mg glucuronic acid /g VS ALE , +62%) than bioaggregates fed with no/very little volatile fatty acids. Mannuronic acids are involved in the cohesion of the hydrogels. ALE hydrogels elasticity changed significantly with the type/origin of the bioaggregates. ALE hydrogels elasticity from AGS was always higher than from flocs when fed with real WW. Hence, different types of sludge impact the properties of the recovered ALE.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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